CA1244851A - High pressure shaft seal - Google Patents
High pressure shaft sealInfo
- Publication number
- CA1244851A CA1244851A CA000470316A CA470316A CA1244851A CA 1244851 A CA1244851 A CA 1244851A CA 000470316 A CA000470316 A CA 000470316A CA 470316 A CA470316 A CA 470316A CA 1244851 A CA1244851 A CA 1244851A
- Authority
- CA
- Canada
- Prior art keywords
- shell
- seal
- elastomeric body
- lip
- bonded
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/322—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip supported in a direction perpendicular to the surfaces
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Devices (AREA)
- Mechanical Sealing (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A lip type bonded shaft seal adapted to seal against substantial fluid pressure. The seal includes a low-friction liner bonded to a sealing portion of an elastomeric element which is bonded to a U-shaped metal shell which helps to support the sealing lip portion.
The low-friction liner is not bonded to any part of the metal shell.
A lip type bonded shaft seal adapted to seal against substantial fluid pressure. The seal includes a low-friction liner bonded to a sealing portion of an elastomeric element which is bonded to a U-shaped metal shell which helps to support the sealing lip portion.
The low-friction liner is not bonded to any part of the metal shell.
Description
8S~
HIGH PRESSURE SHAFT SEAL
Field of the Invention This invention relates to lip seals for rela-tively rotatable machine elements and more particu-larly to an improved lip seal of relatively simpleconstruction and capable of operating in a rela-tively high pressure environment.
Back~round of the Invention A wide variety of lip type seals have been used in association with relatively rotatable machine elements for many years. Such seals have generally provided satisfactory and long-lived service in those applications involving little or no fluid pressure to be retained. However, as the contained fluid pressure increases, functional problems begin to arise in seal operation. Among the more common problems are accelerated lip wear and lip distortion. In more extreme cases, lip distortion can actually go so far as to fracture the sealLng element or to allow the lip to turn inside out.
Numerous attempts have been made to overcome these and other problems with a variety of seal designs. ~Some measure of success has been achieved, ~but the results have not been fully satisfactory.
For example, a variety of back-up memb~ers have been employed to prevent or reduce lip distortions.
Also, low-friction lip liners have been utilized to reduce excessive lip wear. Examples of previous~designs with back-up members are ilIus-~trated and~described~ in U.S. Patents 3,254,898, 3,495,84~3 and 4~,300,77~. Low-friction lip liners ~are~shown in U. S.~ Pa~tents 3,495,843 and 4,289,321.
While~each o~f these prior art designs may provide some service~improvement in high pressure sealing, ~ ~ .
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each suffers from one or more shortcomings such as complex and expensive design, inability to function properly in low pressure applications or inability to accommodate shaft runout.
U.S. Patent 3,495,~43 illustrates a lip type seal having a low-friction resin liner and a back-up piece designed to reduce lip distortion and/or reversal upon exposure to high pressure. However, the back-up piece or insert is a separate element which must be fabricated separately, which must be snapped into place and which can separate in ser,vice unless it is positively ~etained as by the ` plate shown in FIG. 2. It is also significant that the liner does not extend along the whole surface of the elastomeric element and there is no contact between the shell and the liner. The flex charac-teristics change abruptly at the end of the liner and thus may concentrate stresses in this area and bring about premature faiIure, particularly where there may be any degree of shaft runout.
U.S. Patent 4,289,321 describes a lip type pressure seal having a PTFE liner. However, this is a dual lip seal and is designed to function be-tween two (2) areas of pressure and to allow purging of pressure in one direction but not in the other.
Again, there is no contact between the liner and the shell.
U.S. Patent 3,254,898 describes another lip type pressure seal which appears to be similar to that of the present~invention but which is signifi-cantly different in several respects. Among these differences, perhaps the most significant is the fact that there are really two (2~ sealing lips and there is no bond between them thus allowing them to function independently of one another. Further, the old structure is of the assembled type and rather complex as compared to the present invention.
S~
Other differences between these prior art de-signs and the present invention will be apparent to those skilled in the seal art.
Summary of the Invention In order to overcome the above-recited and other shortcomings, the present invention provides a simpli-fied seal design having a metal shell member, an elastomeric lip forming member or body and a low-friction liner layer bonded to the surface of the lip forming member and extending between portions of the elastomeric member and the shell member.
It is a primary object of the invention to pro-vide a lip type shaft seal which will effectively seal against substantial fluid pressure while pro-viding good operating life.
It is a fur~her object to provide a lip type pressure seal which will be effective and long-lasting while accommodating greater degrees of shaft runout than previous pressure seal designs.
Another object of the invention is to provide a seal which is relatively simplified in design and inexpensive to produce.
Brief Description of the Drawings A fuller understanding of the present invention will be gained by reference to the following detailed description when read in conjunction with the attached drawings in which:
FIG. 1 is a partial cross-sectional view showing a preferred embodiment of a seal according to the invention in a ready-to-install configuration.
FIG. 2 is a partial cross-sectional view similar to FIG. 1 except that the seal is shown installed be-tween a housing and a shaft.
FIG. 3 is a view similar to that of FIG. 2 except that the seal is distorted to illustrate the effect of~pressure.
s~
Detailed Description of the Invention Referring now to the drawings, FIG. 1 shows a preferred embodiment of the invention including a metal shell 10, an elastomeric body 12, a low-friction lip liner 14 and a spring 16.
Shell 10 comprises a pair of generally cylin-drl~ical portions 20 and 22 and a generally radial portion 24, all forming shell 10 into a more or less U-shaped member. In most instances, shell portion 22 will be shorter in axial extent than portion 20.
Elastomeric body 12 is also generally U-shaped and is bonded to cylindrical and radial portions 20 and 24 respectively of shell 10. Sealing portion 26 of elastomeric body 12 is bonded to low-friction liner 14 so that shell 10, body 12 and liner 14 constitute a unitary structure. Liner 14 extends generally axially from at least a sealing lip 30 along the sealing portion 26 of elastomeric body 12 to a point at!least between the sealing portion 26 and shell portion 22 and preferably to a point in contact with radial portion 24 of shell 10. At all points of contact, the liner 14 is bonded to body 12, but no-where is it bonded to shell 10. In this manner, the whole sealing portion 26 of elastomeric body 12 is more freely flexihle in the radial direction while at the same time, shell portions 22 and 24 support seal-ing portion 26 against high internal pressure.
Cylindrical shell portion 22 is provided with a radiused sur~ace 34 to prevent the liner 14 from contacting any sharp corners and to spread the flex-ing over a broader area and thus reduce stress frac-turing.
~ In FIG. 2 the seal o the invention is shown in an installed configuration between a machine housing 38 and a;relatively rotatable shaft 40 and with zero or ver~low internal pressure. As the seal is in-s~talled~o--r shafF 40, sealing poreion 26 flexes radially outwardly. Since liner 14 and shell 10 are nowhere bonded to one another, portion ~6 is free to flex over its whole axial length and in zero or low pressure situations a gap 42 may be formed between cylindrical shell portion 22 and liner 14. Shell portion 22 should preferably have a shaft clearance or gap 36 not exceeding .040 inches on diameter and more preferably not exceeding .020 inches. The extent of shaft clearance will be governed by the extent of shaft runout anticipated and by the amount of fluid pressure to be sealed.
In FIG. 3, the seal is again shown in an in-stalled configuration but with substantial internal pressure. Thus, the seal portion 26 is flexed radially inwardly and axially outwardly in reaction to the pressure and gap 42 as seen in FIG. 2 is total-ly closed. The shaft contact area or band of lip 30 is substantially increased, but the low-friction nature of the liner keeps wear at a minimum. Radiused surface 34 of shell portion 22 supports a portion of liner 14 but does not have a tendency to cut the liner.
At the same time, since there is no bonding of the liner to the shell along surface 34, sealing portion 26 and liner 14 bonded thereto are flexible over their fulI axial extent.~ Thus, they are subject less to stress fractures and they are better able to compensate for shaft runout.
The metal shell 10 will most often be made of carblon steel but other metals and alloys such as brass, stainless steel and aluminum may be used. In a like manner, the elas;tomeric body 12 may most commonly be of nitri~le compounds but other elastomers such as neoprene, fluoroelastomers and others will be used according to the various fluids to be sealed. Low friction liner 14 is preferab;ly made of polytetrafluoroethylene (PTFE) although other low-friction resins such as polyamides may be used. ~Finally, spring 16 may be of carbon ~teel or stainless steel.
: ~ :
~ . I
:
lZ'~4~5 In those installations where any substantial fluid pressure is to be retained, means should be provided to retain the seal in sealing position. For example, a snap ring 44 is shown in FIGS. 2 and 3 to retain the seal assembly in housing 38. Alternative means could be a plate attached to housing 38. Another alternative could be a relatively thick plate with an axially out-wardly extending seal receiving bore. The seal would in this case be installed with shell portion 24 against the`bottom of the seal receiving bore.
While the full, pressure sealing capabilities of the present invention have not yet been determined, experience thus far has shown good results in sealing ; pressures up to 2000 p.s.i. with low surface speed and 1~5 rotary or oscillating shaft motion. At surface speeds on the order of 1000 feet per minute, pressures on the order of 100 p.s.i. have ~een sealed.
For the sake of convenience, ther~ is illustrated a seal intended to be pressed into a housing bore and to seal against a rotary shaft. However, it is to be understood that the invention may be equally well em-bodied in a seal designed to be pressed onto a shaft or axle and to seal against a relatively rotatable housing.
Also for convenience, the seal has been illustrated with a garter spring. However, other springs, such as stain-less steel finger springs, may be used and under appro-priate circumstances, it may be unnecessary to have any spring.
It is also to be noted that throughout the pre-ceding description and the following cLaims, the termsgenerally cylindrical and generally axially extending, in reference to portions of the metal shell and the elastomeric body, are intended to encompass embodiments where there is something of a frustoconical bias, parti-cularly in those parts which form and support the seal-ing portion.
: ~ :
.
' .
8S~
While preferred embodiments of the invention have been shown and described in detail, other modi-fications will be readily apparent to those skilled in the art of shaft seals. Thus, the preceding specification should be interpreted as exemplary rather than as limiting and the scope of the invention is defined by the following claims.
.
~ :
:: :
HIGH PRESSURE SHAFT SEAL
Field of the Invention This invention relates to lip seals for rela-tively rotatable machine elements and more particu-larly to an improved lip seal of relatively simpleconstruction and capable of operating in a rela-tively high pressure environment.
Back~round of the Invention A wide variety of lip type seals have been used in association with relatively rotatable machine elements for many years. Such seals have generally provided satisfactory and long-lived service in those applications involving little or no fluid pressure to be retained. However, as the contained fluid pressure increases, functional problems begin to arise in seal operation. Among the more common problems are accelerated lip wear and lip distortion. In more extreme cases, lip distortion can actually go so far as to fracture the sealLng element or to allow the lip to turn inside out.
Numerous attempts have been made to overcome these and other problems with a variety of seal designs. ~Some measure of success has been achieved, ~but the results have not been fully satisfactory.
For example, a variety of back-up memb~ers have been employed to prevent or reduce lip distortions.
Also, low-friction lip liners have been utilized to reduce excessive lip wear. Examples of previous~designs with back-up members are ilIus-~trated and~described~ in U.S. Patents 3,254,898, 3,495,84~3 and 4~,300,77~. Low-friction lip liners ~are~shown in U. S.~ Pa~tents 3,495,843 and 4,289,321.
While~each o~f these prior art designs may provide some service~improvement in high pressure sealing, ~ ~ .
lZ~B~L
each suffers from one or more shortcomings such as complex and expensive design, inability to function properly in low pressure applications or inability to accommodate shaft runout.
U.S. Patent 3,495,~43 illustrates a lip type seal having a low-friction resin liner and a back-up piece designed to reduce lip distortion and/or reversal upon exposure to high pressure. However, the back-up piece or insert is a separate element which must be fabricated separately, which must be snapped into place and which can separate in ser,vice unless it is positively ~etained as by the ` plate shown in FIG. 2. It is also significant that the liner does not extend along the whole surface of the elastomeric element and there is no contact between the shell and the liner. The flex charac-teristics change abruptly at the end of the liner and thus may concentrate stresses in this area and bring about premature faiIure, particularly where there may be any degree of shaft runout.
U.S. Patent 4,289,321 describes a lip type pressure seal having a PTFE liner. However, this is a dual lip seal and is designed to function be-tween two (2) areas of pressure and to allow purging of pressure in one direction but not in the other.
Again, there is no contact between the liner and the shell.
U.S. Patent 3,254,898 describes another lip type pressure seal which appears to be similar to that of the present~invention but which is signifi-cantly different in several respects. Among these differences, perhaps the most significant is the fact that there are really two (2~ sealing lips and there is no bond between them thus allowing them to function independently of one another. Further, the old structure is of the assembled type and rather complex as compared to the present invention.
S~
Other differences between these prior art de-signs and the present invention will be apparent to those skilled in the seal art.
Summary of the Invention In order to overcome the above-recited and other shortcomings, the present invention provides a simpli-fied seal design having a metal shell member, an elastomeric lip forming member or body and a low-friction liner layer bonded to the surface of the lip forming member and extending between portions of the elastomeric member and the shell member.
It is a primary object of the invention to pro-vide a lip type shaft seal which will effectively seal against substantial fluid pressure while pro-viding good operating life.
It is a fur~her object to provide a lip type pressure seal which will be effective and long-lasting while accommodating greater degrees of shaft runout than previous pressure seal designs.
Another object of the invention is to provide a seal which is relatively simplified in design and inexpensive to produce.
Brief Description of the Drawings A fuller understanding of the present invention will be gained by reference to the following detailed description when read in conjunction with the attached drawings in which:
FIG. 1 is a partial cross-sectional view showing a preferred embodiment of a seal according to the invention in a ready-to-install configuration.
FIG. 2 is a partial cross-sectional view similar to FIG. 1 except that the seal is shown installed be-tween a housing and a shaft.
FIG. 3 is a view similar to that of FIG. 2 except that the seal is distorted to illustrate the effect of~pressure.
s~
Detailed Description of the Invention Referring now to the drawings, FIG. 1 shows a preferred embodiment of the invention including a metal shell 10, an elastomeric body 12, a low-friction lip liner 14 and a spring 16.
Shell 10 comprises a pair of generally cylin-drl~ical portions 20 and 22 and a generally radial portion 24, all forming shell 10 into a more or less U-shaped member. In most instances, shell portion 22 will be shorter in axial extent than portion 20.
Elastomeric body 12 is also generally U-shaped and is bonded to cylindrical and radial portions 20 and 24 respectively of shell 10. Sealing portion 26 of elastomeric body 12 is bonded to low-friction liner 14 so that shell 10, body 12 and liner 14 constitute a unitary structure. Liner 14 extends generally axially from at least a sealing lip 30 along the sealing portion 26 of elastomeric body 12 to a point at!least between the sealing portion 26 and shell portion 22 and preferably to a point in contact with radial portion 24 of shell 10. At all points of contact, the liner 14 is bonded to body 12, but no-where is it bonded to shell 10. In this manner, the whole sealing portion 26 of elastomeric body 12 is more freely flexihle in the radial direction while at the same time, shell portions 22 and 24 support seal-ing portion 26 against high internal pressure.
Cylindrical shell portion 22 is provided with a radiused sur~ace 34 to prevent the liner 14 from contacting any sharp corners and to spread the flex-ing over a broader area and thus reduce stress frac-turing.
~ In FIG. 2 the seal o the invention is shown in an installed configuration between a machine housing 38 and a;relatively rotatable shaft 40 and with zero or ver~low internal pressure. As the seal is in-s~talled~o--r shafF 40, sealing poreion 26 flexes radially outwardly. Since liner 14 and shell 10 are nowhere bonded to one another, portion ~6 is free to flex over its whole axial length and in zero or low pressure situations a gap 42 may be formed between cylindrical shell portion 22 and liner 14. Shell portion 22 should preferably have a shaft clearance or gap 36 not exceeding .040 inches on diameter and more preferably not exceeding .020 inches. The extent of shaft clearance will be governed by the extent of shaft runout anticipated and by the amount of fluid pressure to be sealed.
In FIG. 3, the seal is again shown in an in-stalled configuration but with substantial internal pressure. Thus, the seal portion 26 is flexed radially inwardly and axially outwardly in reaction to the pressure and gap 42 as seen in FIG. 2 is total-ly closed. The shaft contact area or band of lip 30 is substantially increased, but the low-friction nature of the liner keeps wear at a minimum. Radiused surface 34 of shell portion 22 supports a portion of liner 14 but does not have a tendency to cut the liner.
At the same time, since there is no bonding of the liner to the shell along surface 34, sealing portion 26 and liner 14 bonded thereto are flexible over their fulI axial extent.~ Thus, they are subject less to stress fractures and they are better able to compensate for shaft runout.
The metal shell 10 will most often be made of carblon steel but other metals and alloys such as brass, stainless steel and aluminum may be used. In a like manner, the elas;tomeric body 12 may most commonly be of nitri~le compounds but other elastomers such as neoprene, fluoroelastomers and others will be used according to the various fluids to be sealed. Low friction liner 14 is preferab;ly made of polytetrafluoroethylene (PTFE) although other low-friction resins such as polyamides may be used. ~Finally, spring 16 may be of carbon ~teel or stainless steel.
: ~ :
~ . I
:
lZ'~4~5 In those installations where any substantial fluid pressure is to be retained, means should be provided to retain the seal in sealing position. For example, a snap ring 44 is shown in FIGS. 2 and 3 to retain the seal assembly in housing 38. Alternative means could be a plate attached to housing 38. Another alternative could be a relatively thick plate with an axially out-wardly extending seal receiving bore. The seal would in this case be installed with shell portion 24 against the`bottom of the seal receiving bore.
While the full, pressure sealing capabilities of the present invention have not yet been determined, experience thus far has shown good results in sealing ; pressures up to 2000 p.s.i. with low surface speed and 1~5 rotary or oscillating shaft motion. At surface speeds on the order of 1000 feet per minute, pressures on the order of 100 p.s.i. have ~een sealed.
For the sake of convenience, ther~ is illustrated a seal intended to be pressed into a housing bore and to seal against a rotary shaft. However, it is to be understood that the invention may be equally well em-bodied in a seal designed to be pressed onto a shaft or axle and to seal against a relatively rotatable housing.
Also for convenience, the seal has been illustrated with a garter spring. However, other springs, such as stain-less steel finger springs, may be used and under appro-priate circumstances, it may be unnecessary to have any spring.
It is also to be noted that throughout the pre-ceding description and the following cLaims, the termsgenerally cylindrical and generally axially extending, in reference to portions of the metal shell and the elastomeric body, are intended to encompass embodiments where there is something of a frustoconical bias, parti-cularly in those parts which form and support the seal-ing portion.
: ~ :
.
' .
8S~
While preferred embodiments of the invention have been shown and described in detail, other modi-fications will be readily apparent to those skilled in the art of shaft seals. Thus, the preceding specification should be interpreted as exemplary rather than as limiting and the scope of the invention is defined by the following claims.
.
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Claims (16)
1. A lip type seal comprising (a) an annular generally U-shaped metal shell having a pair of generally cylindrical portions and a generally radial portion extending between ends of said cylindrical portions, (b) an elastomeric body bonded to said general-ly radial portion of said shell and (c) a low-friction lip liner bonded to a seal-ing portion of said elastomeric body at all points of contact therebetween and extending axially at least from a sealing lip, thence be-tween said elastomeric body and one of said generally cylindrical shell portions and to a point adjacent to said radial portion of said shell, said low-friction liner being bonded only to said elastomeric body.
2. The seal according to claim 1 wherein one of said cylindrical portions of said shell is adapted to be press fitted into a machine housing and said other cylindrical shell portion is adapted to help to support said lip.
3. The seal according to claim 2 wherein said other cylindrical shell portion is located radial-ly inwardly in relation to said one of said cylin-drical portions.
4. The seal according to claim 3 wherein said other cylindrical shell portion is shorter than said one of said cylindrical portions.
5. The seal according to claim 1 wherein said lip liner extends to a point in contact with said radial portion of said shell.
6. The seal according to claim 2 wherein said elastomeric body is also bonded to that cylindri-cal shell portion which is adapted to be press fitted into a machine housing.
7. The seal according to claim 1 further com-prising a spring adapted to maintain said sealing lip in sealing contact with a relatively rotatable machine element.
8. The seal according to claim 7 wherein said spring is a garter spring.
9. A lip type annular seal intended for sealing high pressures, said seal comprising:
(a) A generally U-shaped metal shell member having a pair of generally cylindrical portions and a generally radial portion extending between ends of said cylindrical portions, (b) An elastomeric body bonded to said radially extending portion of said shell member and (c) a low-friction liner bonded only to a radially inner, generally cylindrical surface of said elastomeric body, said liner extending axially in one direction at least as far as the inner edge of a sealing lip and in the other axial direction to a position between a portion of said elastomeric body and a generally cylin-drical portion of said shell positioned radially inwardly of said portion of said elastomeric body and of said interposed portion of said low-friction liner.:
(a) A generally U-shaped metal shell member having a pair of generally cylindrical portions and a generally radial portion extending between ends of said cylindrical portions, (b) An elastomeric body bonded to said radially extending portion of said shell member and (c) a low-friction liner bonded only to a radially inner, generally cylindrical surface of said elastomeric body, said liner extending axially in one direction at least as far as the inner edge of a sealing lip and in the other axial direction to a position between a portion of said elastomeric body and a generally cylin-drical portion of said shell positioned radially inwardly of said portion of said elastomeric body and of said interposed portion of said low-friction liner.:
10. The seal according to claim 9 wherein an outer cylindrical portion of said shell is adapted to be press fitted into a machine housing and said inner cylindrical portion of said shell is adapted to help to support said lip.
11. The seal according to claim 10 wherein said inner cylindrical shell portion is shorter than said outer cylindrical shell portion.
12. The seal according to claim 11 wherein said elastomeric body is also bonded to said outer cylin-drical portion of said shell.
13. The seal according to claim 9 further compris-ing a spring adapted to maintain said sealing lip in sealing contact with a relatively rotatable shaft.
14. The seal according to claim 13 wherein said spring is a garter spring.
15. An apparatus including in combination (a) a machine housing having a seal receiving counterbore, (b) a relatively rotatable shaft and (c) a lip type seal comprising:
(i) an annular generally U-shaped metal shell having a pair of generally cylindri-cal portions and a generally radial por-tion extending between ends of said cylin-drical portions, (ii) an elastomeric body bonded to said generally radial portion of said shell and (iii) a low-friction lip liner bonded to a sealing portion of said elastomeric body at all points of contact therebetween and extending axially at least from a sealing lip, thence between said elastomeric body and one of said-generally cylindrical shell portions and to a point adjacent to said radial portion of said shell, said low-friction liner being bonded only to said elastomeric body.
(i) an annular generally U-shaped metal shell having a pair of generally cylindri-cal portions and a generally radial por-tion extending between ends of said cylin-drical portions, (ii) an elastomeric body bonded to said generally radial portion of said shell and (iii) a low-friction lip liner bonded to a sealing portion of said elastomeric body at all points of contact therebetween and extending axially at least from a sealing lip, thence between said elastomeric body and one of said-generally cylindrical shell portions and to a point adjacent to said radial portion of said shell, said low-friction liner being bonded only to said elastomeric body.
16. The apparatus of claim 15 further comprising means for retaining said seal in proper sealing position in said housing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/615,159 | 1984-05-30 | ||
| US06/615,159 US4504067A (en) | 1984-05-30 | 1984-05-30 | High pressure shaft seal with low-friction lip liner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1244851A true CA1244851A (en) | 1988-11-15 |
Family
ID=24464244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000470316A Expired CA1244851A (en) | 1984-05-30 | 1984-12-17 | High pressure shaft seal |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US4504067A (en) |
| EP (1) | EP0165715B1 (en) |
| AT (1) | ATE49277T1 (en) |
| CA (1) | CA1244851A (en) |
| DE (1) | DE3575187D1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4747605A (en) * | 1986-05-30 | 1988-05-31 | Dana Corporation | Fluid pressure seal with pressure distortion barrier |
| US5067732A (en) * | 1990-04-16 | 1991-11-26 | Rockwell International Corporation | Seal assembly |
| US20020158421A1 (en) * | 2001-02-23 | 2002-10-31 | Johnston David Ernest | Shaft seal having a hinge and a liner |
| DE10083288B3 (en) * | 1999-09-27 | 2012-08-30 | Jtekt Corp. | Seal and rotation assembly for use with this seal |
| JP3890925B2 (en) * | 2001-07-06 | 2007-03-07 | 株式会社日立製作所 | High pressure fuel pump with sealing mechanism and sealing mechanism thereof |
| US6997461B2 (en) * | 2001-07-17 | 2006-02-14 | Trelleborg Sealing Solutions U.S., Inc. | High speed high pressure rotary |
| CN1306193C (en) * | 2002-02-15 | 2007-03-21 | 卡尔·弗罗伊登伯格公司 | Sealing ring |
| US6845986B2 (en) | 2002-04-26 | 2005-01-25 | Stemco Llc | Low torque seal assembly |
| US6722657B2 (en) | 2002-05-31 | 2004-04-20 | Stemco Llc | Low torque seal assembly with open cell filter media |
| US7419165B2 (en) * | 2004-08-18 | 2008-09-02 | Federal-Mogul World Wide, Inc. | Seal assembly and method of manufacturing the same |
| US20090189354A1 (en) | 2008-01-25 | 2009-07-30 | Harvey Lee L | Reciprocating-rod seal |
| US20100194053A1 (en) * | 2009-02-02 | 2010-08-05 | Jacques Gourde | Gasket and packing panel assembly for trunnion/shaft |
| US9671024B2 (en) * | 2009-12-21 | 2017-06-06 | Aktiebolaget Skf | Method and device of a sealing system |
| DE102010045672B3 (en) | 2010-09-17 | 2012-03-01 | Carl Freudenberg Kg | Method for producing a seal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB585488A (en) * | 1944-11-10 | 1947-02-07 | Super Oil Seals And Gaskets Lt | Improvements relating to oil retaining and dirt excluding seals for use in machinery |
| US2804324A (en) * | 1953-09-11 | 1957-08-27 | Gen Motors Corp | Seal |
| US2804325A (en) * | 1954-07-16 | 1957-08-27 | Gen Motors Corp | Fluid seal |
| FR1345547A (en) * | 1963-01-29 | 1963-12-06 | Goetzewerke | Shaft seal |
| US3495843A (en) * | 1967-04-17 | 1970-02-17 | Chicago Rawhide Mfg Co | Pressure seal with antiextrusion means |
| DE2218376A1 (en) * | 1971-04-19 | 1972-11-02 | Aisin Seiki K.K., Kariya, Aichi (Japan) | Composite sealing ring - having harder nose to prevent jamming between components sealed |
| GB1478273A (en) * | 1974-03-22 | 1977-06-29 | Howaldtswerke Deutsche Werft | Sealing ring for rotating parts for example shafts |
| CA1039766A (en) * | 1975-01-06 | 1978-10-03 | Dennis N. Denton | Bonded tfe lip seal |
| DE3220192C1 (en) * | 1982-05-28 | 1983-11-17 | Goetze Ag, 5093 Burscheid | Lip sealing ring |
| DE3221526C2 (en) * | 1982-06-08 | 1986-03-13 | Fa. Carl Freudenberg, 6940 Weinheim | Shaft seal |
-
1984
- 1984-05-30 US US06/615,159 patent/US4504067A/en not_active Expired - Lifetime
- 1984-12-17 CA CA000470316A patent/CA1244851A/en not_active Expired
-
1985
- 1985-05-21 DE DE8585303560T patent/DE3575187D1/en not_active Expired - Fee Related
- 1985-05-21 AT AT85303560T patent/ATE49277T1/en active
- 1985-05-21 EP EP85303560A patent/EP0165715B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0165715B1 (en) | 1990-01-03 |
| DE3575187D1 (en) | 1990-02-08 |
| ATE49277T1 (en) | 1990-01-15 |
| US4504067A (en) | 1985-03-12 |
| EP0165715A1 (en) | 1985-12-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |